i feel really bad because i was looking after my freinds horse when she was away in florida and ive always loved to ride but havent for a long time i tacked him up and went for a hack but before long he started to sweat and froth loads so we turned round and rode back to teh yard the following day my freind came back from holiday and she rang me up crying saying her horse had something cronicly wrong whith his back do u think this has something to do with me?